Does erode mean to wear away?
It means to wear away slowly. 1: to diminish or destroy by degrees: a: to eat into or away by slow destruction of substance (as by acid, infection, or cancer) b: to wear away by the action of water, wind, or glacial ice eroded the hillside> c: to cause to deteriorate or disappear as if by eating or wearing away eroding buying power> S
Wind,water, extreme heat/cold ,pressure are agents of erosion of the top soil on earth's surface.Mining can erode the surface soil .Melting of glaciers,deforestation,flooding of rivers can wash away the top soil just as extreme heat/cold can crumble rocks with the high velocity winds can blow away top soil/erode rocks to form sand dunes.
What type of "bumps on the bottom" do you mean? If its a bump on the inside of the gums situated beneath the premolars, it's known as the torus. just a bone elevation, nothing harmful. If it is at the back of the first molars, the 2nd molar teeth are erupting nothing to be cautious about. If it is on the teeth itself, usually the front ones it's called mammalians and usually it will erode…